[Fixed] Dialog window hide behind of the main window by LMB click.

[tkbd]

When Opened dialogs operation.
for example Body | Something primitive | RMB , Camera Positon or Camera setting dialog.

If LMB click on anywhere of the main window, the main window moves to the front.

So the dialog window hide behind of the main window.
This interferes with an User's operation.
Pleaae fix this

(The case of MMB(move camera) or RMB(camera reset) click no problem)

MacOS 10.11.6
Wings3D 2.1.2